Improvement in pump-pistons



DANIEL JOHNSON.

improvement in Pump-Pistons.f

Fig. 2

InVe'ILO.

Fig l Witnesses.

UNITED STATES PATENT OFFICE.

IMPROVEMENT IN PUMP-PISTONS.

Specification forming part of Letters Patent No. 119,852, dated October10, 1871.

To all whom fit may concern:

Be it known that I, DANIEL JOHNSON, of Ashland, in the county of Ashlandand State of Ohio, have invented a new and valuable Improvement inPumps; and I do hereby declare that the following is a full, clear, landexact description ofthe construction and operation orn thesame,rei'erence being had to the annexed drawing makinga part oi' thisspecification, and to the letters and tigures oi' reference markedthereon.

Figure l of the drawing is a representation or a vertical section ot' myinvention. Fig. 2 is a face view of pump-bucket.

This invention has relation to pumps; and consists in the nov elconstruction of the doubleacting piston, whereby it is designed to bewell adapted for its piupose. This improved construction consists in.providing for the attachment of the cone-shaped leathers, a central bodyor column formed with spreading conical ends, and between and connectingthem acentral stem curving inwardly from each expanded end.

Referring to the accompanying drawing illustrating this invention, A Arepresent two pumptubes placed side by side, one extending above theother in the ordinary manner. They are held together in this position bymeans of the clamps a. B. The tube A extends down into the well, and iswidened at its upper part to form the piston-chamber. C representsavalve hinged at the lower end of said chamber. D is an aperture bymeans of which the tubes A A communicate with each other. E designates avalve hinged so as to open toward the tube A, and adapted to close andopen the aperture D. F represents the discharge-aperture at the upperpart of the tube A. G designates the piston-rod pivoted to the handle H,which is pivoted to the top of the tube A. Ivrepresents the block orcenterpiece at the lower end of the piston-rod, to which are attachedthe brackets J J. This block I is provided with the conical ends k 7c,expanding toward each other and connected by the center column l, whichis made small at its middle portion and expands in acurved manner towardthe conical ends k lc. Between the conical portions of each end to whichthe latter is fastened, and the curved tapering stem,'a cylindricalsurface, m, is formed, which regulates the contraction of the bucket andprevents it from getting out of shape. When the piston is raised thelower bucket is designed to expand and lift the valve O by its suction,drawing the waterfrom the well into the chamber b. When the piston islowered the upper bucket expands while the lower contracts and forcesthe water through the aperture D through the tube A. rIhe recessedexterior of the stem l is designed to make a large space be tween thebuckets for the reception of the water, thus creating a water-packing.

What I claim as my invention, and desire to secure by Letters Patent,is-

The piston herein described, provided with the conical leather buckets JJ and the block I having conical ends 7c 7c connected by cylinders m tothe center stem l, tapering from each end toward its middle portion, asspecified.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

DANIEL J OHNSON.`

Witnesses:

J. A. lVIcOLUsKY,

B. J oHNsoN. (118)

